Equipment cooling water pump for nuclear power station

Abstract

The invention discloses an equipment cooling water pump for a nuclear power station, which belongs to a single-stage single-suction hanging arm horizontal type centrifugal pump. The water pump comprises a stator assembly, a rotor assembly, a bearing assembly and a shaft seal assembly, wherein the stator assembly comprises a pump body, a pump cover and a pair of pump body sealing rings; the rotor assembly comprises a pump shaft, an impeller, an impeller nut and two bearing retaining sleeves; the bearing assembly comprises a bearing body, a bearing assembly and two bearing glands; and the shaftseal assembly comprises a bump body seal and a bearing oil seal. The equipment cooling water pump completely meets the requirement of the installation space of the nuclear power station and solves the problems of large volume, inconvenience of maintenance, low vibration resistance and the like of the equipment cooling water pump of the nuclear power station. Simultaneously, a bearing cooling modeis changed into a natural air cooling mode from a water cooling mode, the complexity of a system is further optimized, and an excellent hydraulic model is selected, so that the problem of the cavitation performance of a single-stage single-suction equipment cooling water pump can be completely solved.

Description

technical field [0001] The invention relates to a centrifugal pump, in particular to an equipment cooling water pump used in nuclear power plants. Background technique [0002] The main functions of equipment cooling water pumps in nuclear power plants are as follows: [0003] 1) Cooling various nuclear island heat exchangers; [0004] 2) The heat load is transferred to seawater through the heat exchanger cooled by the important plant water pump; [0005] 3) Formation of a barrier between the nuclear island heat exchangers and the seawater to prevent uncontrolled release of radioactive fluids from the associated heat exchangers into the seawater. [0006] The main safety functions of the equipment cooling water pump are as follows: [0007] 1) Transfer heat from important safety-related rooms, systems and equipment to the final heat sink - seawater, together with the important plant safety water pump system under normal and accidental operating conditions; [0008] 2) Eq...

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Problems solved by technology

[0010] The object of the present invention is to overcome the deficiencies of the prior art and provide a cooling water pump for equipment in nuclear power plants, which solves the problems of large volume, inconvenient maintenance, poor shock resistance, etc. Cavitation performance of cooling water pump for suction equipment

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